Discovered this last night, so made a quick vid. To my knowledge, EVERY cleanse in the game incurs some type of cooldown, 8-15 seconds. Detox has an 8 second CD, but it currently is not being triggered, resulting in the ability to spam it a la WotLK style.
http://youtu.be/z7Ns6XZdCZo
~~Grave
Edit: apparently i cannot embed vids, so a link will have to do. :/